#!/bin/sh
#
# $NetBSD: t_link,v 1.5 2006/11/09 16:20:06 jmmv Exp $
#
# Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Julio M. Merino Vidal, developed as part of Google's Summer of Code
# 2005 program.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
#

#
# Verifies that the link operation works.
#

test_run() {
	test_mount

	test_name "Link operation works"
	touch a || die
	touch z || die
	eval $(stat -s a | sed -e 's|st_|sta_|g')
	eval $(stat -s z | sed -e 's|st_|stz_|g')
	test ${sta_ino} != ${stz_ino} || die
	test ${sta_nlink} -eq 1 || die
	ln a b || die
	test_name "Link count is correct after links are created"
	eval $(stat -s a | sed -e 's|st_|sta_|g')
	eval $(stat -s b | sed -e 's|st_|stb_|g')
	test ${sta_ino} = ${stb_ino} || die
	test ${sta_nlink} -eq 2 || die
	test ${stb_nlink} -eq 2 || die
	test_name "Link count is correct after links are deleted"
	rm a || die
	eval $(stat -s b | sed -e 's|st_|stb_|g')
	test ${stb_nlink} -eq 1 || die
	rm b || die

	test_name "Link operation works in subdirectories"
	touch a || die
	mkdir c || die
	ln a c/b || die
	test_name "Link count is correct after links are created"
	eval $(stat -s a | sed -e 's|st_|sta_|g')
	eval $(stat -s c/b | sed -e 's|st_|stb_|g')
	test ${sta_ino} = ${stb_ino} || die
	test ${sta_nlink} -eq 2 || die
	test ${stb_nlink} -eq 2 || die
	test_name "Link count is correct after links are deleted"
	rm a || die
	eval $(stat -s c/b | sed -e 's|st_|stb_|g')
	test ${stb_nlink} -eq 1 || die
	rm c/b || die
	rmdir c || die

	mkdir dir || die
	touch dir/a || die
	echo 'ln dir/a dir/b' | kqueue_monitor 2 dir dir/a || die
	test_name "Creating a link raises NOTE_LINK on the source file"
	kqueue_check dir/a NOTE_LINK || die
	test_name "Creating a link raises NOTE_WRITE on the parent directory"
	kqueue_check dir NOTE_WRITE || die

	echo 'rm dir/a' | kqueue_monitor 2 dir dir/b || die
	# XXX According to the (short) kqueue(2) documentation, the following
	# should raise a NOTE_LINK but FFS raises a NOTE_DELETE...
	test_name "Deleting a link raises NOTE_DELETE on one other link"
	kqueue_check dir/b NOTE_DELETE || die
	test_name "Deleting a link raises NOTE_WRITE on the parent directory"
	kqueue_check dir NOTE_WRITE || die
	rm dir/b || die
	rmdir dir || die

	test_unmount
}

. ${SUBRDIR}/h_funcs.subr
